"Strong-field phenomena involving lasers, ions, atoms, and molecules"

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1) Some of the most advanced experiments on molecule-laser interactions were carried out in NRC laboratories in Ottawa in the past few years. They aim to explain the process where radiation from a laser is absorbed by a simple molecule, such as nitrogen or carbon dioxide. Electrons temporarily ionized by the laser pulse and accelerated to high velocities are driven back onto the ionic molecule. In the recombination process, where the freed electron is captured back, photons of very high energy are emitted. These photons can form a very-short wavelength coherent pulse themselves. Work is proposed to model the role of different electrons responsible for the binding of the molecule in this ionization-recombination process. A better understanding of the mechanisms involved may serve as a guide to create short-pulse lasers that operate in the X-ray regime.